Sustainability doesn’t matter. Musk’s hype holds the market value up (in the short term), and kicking him out could tank it from the controversy alone. That’s all that matters.
I like to think many investors are buy and hold, long term institutional, Warren acolytes or whatever, but in reality the outlook is just so short for so many people now. What matters is the next day and the next quarter, and they can just bail out after that.